Hey! You need to unpack the rar file, if you have winZip, 7rar or winrar installed you can right click on the .rar-file and select "extract here" and it will unpack an .exe-file!
(If I'm not mistaken, if you don't have an unpacking software, you can open the .rar and drop and drag the .exe to your wanted location.)
Hope it goes well! :)